Kazuhisa Suzuki

1-cc Computer: Cross-Layer Integration with 3.4-nW/bps Link and 22-cm Locationing

The first 1-cc computer (OCCC) which integrates a sensor, a wireless transceiver, a computing engine and a battery is demonstrated. Cross-layer innovation includes SPIKE control, which achieves record-low 3.4-nW/bps power with 3-ms UWB current control (one order lower than those of reported). Another proposal is communication-location integration (CLI), which achieves 22-cm location accuracy with 1.3% area overhead. Fabricated OCCC is verified to operate as designed.

A 21-channel 8Gb/s transceiver macro with 3.6ns latency in 90nm CMOS for 80cm backplane communication

A 21-channel 8 Gb/s transceiver is implemented in a 90 nm CMOS technology. 168 Gb/s uncoded data transmission with 3.6 ns latency is achieved with 4-tap FFE, receiver equalization, jitter tolerant CDR and low jitter PLL. Measured bathtub plots for 80 cm FR-4 backplane indicate BER<10-15 with 0.11 UI phase margin at the nominal power consumption of 160 mW/ch.

Tagless location system using UWB impulse radio

A tagless location system is proposed and experimentally demonstrated. The delay profile of UWB impulse radio can be detected easily because of its nanosecond pulse width. This profile appears as spatial information such as the location of a person. The profile is influenced by the propagation environment. Therefore, we can use the delay profile associated with specific location information as an indicator of the tagless location. We describe the system configuration and discuss the results of the principal experiment. The results of a 20-position trial show that the recognition ratio is 60–70%.